Viljandi Weather in September
Thinking of visiting Viljandi in September? Expect moderate temperatures reaching 17°C (63°F) during the day, dropping to 8°C (46°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Viljandi in September
The climate data from previous years indicates about 17 days of rain, averaging 63 mm (2.5 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Viljandi in September
September in Viljandi brings typical temperatures with highs around 17°C (63°F) and lows of 8°C (46°F). Conditions are often most pleasant around the middle of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Viljandi in September
The area enjoys a balanced 175 hours of sunlight, ensuring it's neither too overcast nor too sunny.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Viljandi.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Estonia, check out our Viljandi's climate page.
Viljandi Temperature in September
Min Temperature
8°C (46°F)
Max Temperature
17°C (63°F)
Chance of Rain
55%
Precipitation
63 mm (2.5 in)
Rainy days
17 days
Humidity
82% *
Sunshine
175 hours *
Percentage Sunshine
37% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Viljandi typically drop from around 18°C (64°F) at the start of September to approximately 13°C (55°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Viljandi in September
Browse day-by-day weather records for Viljandi spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Viljandi historical weather extremes in September
The extremes listed below come from historical weather data collected in Viljandi from 1976 through 2025.
- On September 3, 1983, temperatures climbed to 27°C (81°F), marking the warmest September day on record.
- On September 16, 1993, Viljandi saw its coldest September day with temperatures maxing out at 5°C (41°F).
- Viljandi registered its coldest September night on September 28, 1986, with temperatures dropping to -3°C (27°F).
Best Places in Estonia in September
Find out more about the weather in Estonia and which places have the best travel conditions in this month. See all of Estonia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Viljandi in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Viljandi in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Estonia, check out our Viljandi's climate page.
Temperature Rainfall Sunshine Humidity
See the full Viljandi climate overview or explore weather in Estonia.
